Which standard contains the 225.3 requirement discussed in this material?

• A. NFPA 70E
• B. IEEE 1584
• C. UL 489
• D. IEC 60947

Answer: (A)

The main idea here is identifying which standard governs the safety program and work practices for electrical tasks in the workplace. NFPA 70E is the standard that covers electrical safety in the workplace, detailing what an electrical safety program must include, how workers are trained, how hazards are identified and mitigated, and how tasks are planned to reduce exposure to shock and arc flash. That framework is where a clause like 225.3 sits. The other standards are about different things: IEEE 1584 provides the method for calculating arc-flash energy, UL 489 is a fuse standard, and IEC 60947 covers equipment like low-voltage switchgear. So NFPA 70E is the standard that contains the 225.3 requirement.